Pulverizer having a two-part housing



May 22, 1951 o. RzSTRAWN 2,554,071

FULVERIZER HAVING A TWO PART HOUSING Filed July 9, 1949 2 Sheets-Sheet l nnnnnnnnnnnnnnnnnnnnn May 22, 1951 o. R. STRAWN PULVERIZER HAVING A TWO PART HOUSING 2 Sheets-Sheet 2 Filed July 9, 1949 //v VEN TOR ORVAL R- STRAWN,

Patented May 22, 1951 ()rval" R. Strawn, Columbus, Ohio, assignor to The Jeffrey Manufacturing Company, a corporation of Ohio Application July 9; 1949, Serial No. 103,817

This invention relates to a pulverizer or crusher, and an object of the invention is to provide such a device in which the housing which provides the reducing chamber is made up of two principal parts both mounted on a common base, in which one of the parts carries the breaker plate and the feed chute,- and the otherpart supports the material reducing rotor, and in which the second part is adjustable either pivotally or slidably relative to the first part so as to remove the rotor substantially entirely from the first part and to expose it for ready access to the hammers and the like.

Other objects of the invention will appear hereinaiter, the novel featuresand combinations being set forth inthe appended claims;

In the accompanying drawings,

Fig. 1 is a side elevational View of one form of hammer mill type crusher involving my invention;

Fig. 2 is a sectional elevational view of the device of Fig. 1;

Fig. 3 is an elevational view of the machine of Fig. 1, with parts broken away for clarity;

, Fig. 4 is a sectional view of a modification of the machine shown in Figs. 1,2 and 3; and

Fig. 5 is an enlarged elevational sectional view showinga modification of the adjusting meansfor one of the rotor bearings.

As illustratedin Figs. 1, 2 and 3' of the drawings, the crusher or hammermill includes a base l upon which an enclosing housing II is formed which provides a reducing chamber of the crusher within which there is a rotor 12 that rotates upon an axis extending transversely of the housing and reducing chamber. Except for differences hereinafter pointed out, thegeneral arrangement of the crusher is that frequently found in prior art hammer mills so that many of the parts need not be individually described.

The housing H is formed of two principal parts, the first part being designated I3 and the second part M. The first part i3 carries a breaker -means l against which material being reduced is broken after being struck and impelled by the hammers of the rotor l2. This part 13 also provides a top 'feed opening l6 and feed chute H. The second part Id of the casing supports the rotor 12 by virtue of a pair of bearings enclosed in bearing boxes, one of which is seen at I8. Each of said heating boxes is adjustably mounted on a side of the housing section I4 by flexible adjusting means including a plate [9 (see Figs. 1, 3 and 5) having a cup receiving a boss on the bottomof the bearing box Hi, the bearing box I8 being clamped to said plate I9 by'a U-' 6 Claims. (c1. 241--285) 2 shaped yoke 2|. Plate I9 is adiustably supported upon a vertically adjustable threaded rod 22 which is directly below the cup 26 and which is adjustably mounted on a bracket 23 formed as an integral part of the housing section I4.

At opposite ends the plate [9 has downwardly extending adjusting threaded rods 24 provided with adjusting nuts which are primarily for adjusting the level of the plate I9 on the supporting rod 22. In the form of this adjusting mechanism, as illustrated in Fig. 5' of the drawings, instead of a single bracket 23 there is a top plate 25 which rests on the bracket and which can-be adjusted forwardly and rearwardly by athreaded rod 26 integrally attached to said plate 25 and adjustable by a pair of nuts on opposite sides of a bracket 2? through which the rod 25- extends, which bracket 2i is attached to a side plateof the housing section [4. In this construction the top plate of the bracket 23 is provided with elongated slots through which the rods 22 and 24 extend, against which they are clamped together with the top plate 25 by nuts on opposite sides.

of them which are threaded on the rods 22 and 24, respectively.

The section or part M of the housing II alsocarries a bottom'screen 28 which, per se, is of generally standard construction and may alsobe provided with a tramp material bin 29. The complete part of section l4, including the rotor I2 which it supports, is adjustably mounted for sliding or rolling rectilinear movement on the base It) so that it can be adjusted to provide a reducing housing with the rotor l2 therein, as illustrated in Fig. 1 of the drawings, or can be separated so that the rotor i2 is readily accessible for inspection or repair and particularly for the removal or reversal of the swing hammers. To this end there is a pair of anti-friction rollers 33 on each side of the housing section I s at the bottom adapted to roll on guides on the base I 9.

To effect adjustment of the two sections it and M of the housing relative to each other and to move the rotor out of the fixed portion M of the housing I I while maintaining its axis parallel to that position in which it operates to reduce material, there is a pair of threaded rods 35, one on each side of the frame, each of w-hichis held in a bracket 32 attached to the housingpartld by appropriate collars and which threads into'a receiving lug 33 attached to an upright side plate of the housing section i4.

The two rods 3| are operated by ratchet tools 34 which are interconnected by a cross rod '35 to insure uniform movement of both sides of the housing section M as it is adjusted toward or from the housing section [3.

From the above description it is manifest that the two sections l3 and M of the housing may be brought together to form the complete housing II with a reduction chamber for the rotor 12, or they may be separated to provide ready access to the rotor 12 without completely removing any of the parts of either housing section.

In Fig. 4 of the drawings a crusher is illustrated which except for differences specifically pointed out will be understood to follow that of Figs. 1, 2, and 3. In general, the difference lies in the fact that the second part of the housing is adjusted away from the first part by swinging it or pivoting it rather than sliding it or moving it rectilinearly. Certain parts of the crusher of Fig. 4, particularly the bearing boxes and adjusting means, are not shown because 7 they are the same as those seen in Figs. 1 through 3.

The crusher of Fig. 4 includes a base [it upon which there is a housing iil made up of the two parts or sections H3 and HG. Housing part I I3 is provided with breaker means I I5 and with a feed opening H6 and feed chute li'l. A rotor i'2 identical with the previously described rotor 12 is mounted upon the bearings in box 18. Housing section H4 is pivotally mounted on the base H0 about a transverse horizontal axis provided by pivot means 36. At each side of the casing H4 there is a segmental worm gear 3'? which is attached to the adjacent portion of the housing section l l l so that upon rotation of said two gear segments 3? the housing section H t will be rotated upon bearings (not shown) associated with the shaft 36. To effect this rotation there is a worm 3?; carried in a gear housing 39 attached to the base H8. Operation of each worm gear 38 is through a rotatable shaft 40 which is comparable to the previously described shaft 3!, the two shafts it being operable by ratchet tools and an interconnecting cross-rod 35 substantially identical with the operating means of shaft 3! above described.

It is obvious that by adjusting the shafts it the housing section H4 together with the rotor I2 carried thereby may be pivotally adjusted so as to form a complete housing, with the rotor l2 in the reduction chamber formed thereby, or said housing section I M may be pivoted to expose the rotor 12 for ready inspection or repair as above described.

Obviously those skilled in the art may make various changes in the details and arrangement of parts without departing from the spirit and scope of the invention as defined by the claims hereto appended, and applicant therefore wishes not to be restricted to the precise construction herein disclosed.

Having thus described and shown an embodiment of the invention, what it is desired to secure by Letters Patent of the United States l. A hammer mill including a base, a two part housing mounted on said base providing a reducing chamber, one of said housing parts being fixed to said base and including a feed chute, said other housing part being movable upon said base to separate said housing parts, a rotor in said reducing chamber having material reducing hammers and rotating upon an axis extending transversely of said housing and reducing chamber, bearing means carried by each of opposite walls of said movable housing supporting opposite ends of said rotor, breaker means on said fixed housing part in said reducing chamber below said feed chute and extending parallel to the axis of said rotor, screen means on said movable housing part in said housing and below said rotor, and mechanism for moving said movable housing part, bearing means, rotor and screen means whereby said rotor axis moves laterally from its operating position while remaining substantially parallel with respect thereto and said parts carried by said movable housing part are removed from said fixed housing part and exposed for ready access, said mechanism including a pair of spaced screw means, one adjacent each of said opposite side walls of said movable housing part, and operating mechanism interconnecting said screw means for rotation together.

2. A hammer mill including a base, a two part housing mounted on said base providing a reducing chamber, one of said housing parts being fixed to said base and including a feed chute, said other housing part being movable upon said base to separate said housing parts. a rotor in said reducing chamber having material reducing hammers and rotating upon an axis extending transversely of said housing and reducing chamber, bearing means carried by each of opposite walls of said movable housing supporting opposite ends of said rotor, breaker means on said fixed housing part in said reducing chamber below said feed chute and extending parallel to the axis of said rotor, screen means on said movable housing part in said housing and below said rotor, and mechanism for moving said movable housing part, bearing means, rotor and screen means whereby said rotor axis moves laterally from its operating position while remaining substantially parallel with respect thereto and said parts carried by said movable housing part are removed from said fixed housing part and exposed for ready access.

3. Material reducing apparatus including a base, a two part housing mounted on said base providing a reducing chamber, one of said housing parts being fixed to said base and including a feed chute, said other housing part being movable upon said base to separate said housing parts, a rotor in said reducing chamber having material reducing elements and rotating upon an axis extending transversely of said housing and reducing chamber, bearing means carried by each of opposite walls of said movable housing supporting opposite ends of said rotor, breaker means on said fixed housing part in said reducing chamber below said feed chute and extending parallel to the axis of said rotor, and mechanism for moving said movable housing part, bearing means and rotor whereby said rotor axis moves laterally from its operating position while remaining substantially parallel with respect thereto and said parts carried by said movable housing part are removed from said fixed housing part and exposed for ready access.

4. Material reducing apparatus including a base, a two part housing mounted on said base providing a reducing chamber, one of said housing parts being fixed to said base and includin a feed chute, said other housing part being movable upon said base to separate said housing parts, a rotor in said reducing chamber having material reducing elements and rotating upon an axis extending transversely of said housing and reducing chamber, bearing means carried by each of opposite walls of said movable housing supporting opposite ends of said rotor, breaker means in said reducing chamber below said feed chute and extending parallel to the axis of said rotor, and mechanism for moving said movable housing part, bearing means and rotor whereby said rotor axis moves laterally from its operating position while remaining substantially parallel with respect thereto and said parts carried by said movable housing part are removed from said fixed housing part and exposed for ready access.

5. Material reducing apparatus including a base, a two part housing mounted on said base providing a reducing chamber, one of said houslng parts being fixed to said base and including a feed chute, said other housing part being movable upon said base to separate said housing parts, a rotor in said reducing chamber having material reducing elements and rotating upon an axis extending transversely of said housing and reducing chamber, bearing means carried by each of opposite walls of said movable housing supporting opposite ends of said rotor, breaker means on said fixed housing part in said reducing chamber below said feed chute and extending parallel to the axis of said rotor, and antifriction roller means at each of said opposite sides of said movable housing part supporting it upon said base for rectilinear movement whereby said movable housing part, bearing means and rotor are movable laterally and the axis of said rotor remains substantially parallel with respect to its operating position and said parts carried by said movable housing part are removed from said fixed housing part and exposed for ready access.

6. Material reducing apparatus including a base, a two part housing mounted on said base providing a reducing chamber, one of said housing parts being fixed to said base and including a feed chute, said other housing part being movable upon said base to separate said housing parts, a rotor in said reducing chamber having material reducing elements and rotating upon an axis extending transversely of said housing and reducing chamber, bearing means carried by each of opposite walls of said movable housing supporting opposite ends of said rotor, breaker means on said fixed housing part in said reducing chamber below said feed chute and extending parallel to the axis of said rotor, and pivot means at each of said opposite sides of said movable housing part supporting it upon said base for movement whereby said movable housing part, bearing means and rotor are movable laterally and the axis of said rotor remains substantially parallel with respect to its operating position and said parts carried by said movable housing part are removed from said fixed housing part and exposed for ready access.

ORVAL R. STRAWN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 426,946 Merrill Apr. 29, 1890 507,140 Kimplen Oct. 24, 1893 750,701 Robinson Jan. 26, 1904 787,290 Grifiin Apr. 11, 1905 829,792 Kramer Aug. 28, 1906 891,471 Evans et a1. June 23, 1908 1,033,878 Craig July 30, 1912 1,286,831 Sturtevant Dec. 3, 1918 1,729,672 Jackson Oct. 1, 1929 1,902,721 Reynolds Mar. 21, 1933 2,105,764 Feight Jan. 18, 1938 2,450,492 Stevenson Oct. 5, 1948 FOREIGN PATENTS Number Country Date 402,035 France June 14, 1910 (1st addition to No. 12,351) 450,482 Germany Oct. 4, 1927 

